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(Rommel.) B. F. ORTMAN 8v L. Gr. 'GILBERT- i GREASE CUP. No. 278,172

Patented May 22,1883.

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UNTTED STATES PATENT GEEICE.

BARNIM F. ORTMAN AND LEANDER G. GILBERT, 0F BUFFALO, NEWYORK.

GREASE-CUP.

SPECIFICATION forming part of Letters Patent No. 278,172, dated May 22, 1883.

Application tiled March 27, 1 853. (No model.)

To all whom it may concern: i

Be it known that we,BARN1M F. ORTMAN and LEANDER G. GILBERT, both ofthe city of Buii'alo., in the county of Erie and State of New York, have invented a new and useful Improvement Ain Grease-Cups, ot' which theV following is a speeitication.

' This invention relates to an improvementin that class ot' lnbricators in which a solid lubricant-such, for instance, as grease-is employed.

Heretofore such lubricating devices have been provided with a bar or rod, which is littedloosely in the dischargetube ot' the cup, and which rests upon thejournal or otherpart to be lubricated and serves to conduct the heat from such part to thelubricant in the cup, which is thereby melted, and which also serves to conduct the melted lubricant to the parts to be lubricated. In lubricating devices ot' this class 'the grease melts within a certain zone around the conducting bar or tube, and when the lubricant has receded from the conducting ybar or tube to the distance at which it ceases `in order to compact the lubricant in the cup.

The object ot' our invention is to overcome this difficulty and construct the device in such manner that the lubricant will be automati- .eally kept in contact with the discharge device, thereby insuring a continuous flow of lubrieating material to the parts to be lubricated.

Ourinvention consists, to that end, of the improvements in the construction of the lubricator which will be hereinafter fully described,

Vand pointed out in the claims.

In the accompanying drawings, Figure l is a vertical section ot' our improved lubricator.

Fig. 2 is a horizontal section in line mx, Fig. 1.

Like letters of reference refer to like parts in both figures.

A represents the cup or receptacle which receives the lubricating material, and which is provided at its lower end with a tubular threaded extension, A', whereby it is secured to a suitable support;

portion of the cup.

b represents the discharge tube or rod,whieh is arranged loosely in the discharge-opening a, in the bottom of the cup, and which rests upon the journal or other part to be lubricated.

. b" represents an opening or openings formed in the tube Z1 near the bottom of the cup A, so as to conduct the lubricating material from the cup into the tube.

and A2 is the cover or top C represents a piston, which is arranged in the cup A around the tube or rod b. The piston G is composed of a body or disk, d, a cup-v shaped packing-riug, d', and a washer, d2, which serves .to clamp the packing ring d against the under side ot'the disk d, the washer being secured in place by means ot' a screw-threaded hub, d3, formed on the disk d, with which the washer engages.

E represents a sleeve or hollow stein, which passes loosely through the piston C, and is provided on its outer side with a screw-thread, which Aengages in an internal screwthread formed in the cover A2. stem Eis provided with a hand-wheel, e,where by the stem can be turned.

f represents a screw-nut secu red to the lowerend ot' the stem E below the piston C, and which serves as a stop on which the piston rests when in its lowest position.

g represents aspiral or other suitable spring,

which bears against the upper side of the piston and tends to hold the same in contact with the stop o`r serew-nut-f. As shown in the drawings, the spring g surrounds the stem E and bears with its upper end against a screw-nut, h, which is applied tothe stem E, and which can be adjusted thereon for regulating the tension of the spring. The screw-nut h is secured in place by ajam-nut, h'. I represents a sleeve, which is arranged between the spring g and the threaded stem E, and which prevents the spring from coming in contact with the screw-thread.

As represented in the drawings, the tube b extends entirely through the stein E; but when a short tube is suticient the lower portion ofthe stem E only is provided with a bore for the reception of the tube. The upper end of the stemE isprovided with a stuffing-bomb then the cup is filled with lubricating ma- The upper end ot' the IOO terial, the piston is in its highest position and the spring g is compressed. As the lubricating material immediately surrounding the tube I) becomes liqueed and passes ofi', the pressure ot' the spring forces the piston down and keeps the lubricating material compacted against the central tube, thereby keeping the lubricating material at all times in contact with the central tube and insuring a continuous How ot' lubricating material through the tube to the parts to`be lubricated. When the spring q has become fully extended and the lubricating material in the cup is not exhausted, the spring can be further compressed by turning the stem E so as to lower the stop or nut j' and the nuts li h. The piston rests during this adjustment of the stem upon the lubricating` material which is still contained iu the cup, and when the spring has been fully compressed the reaction of the spring will continue to force the piston down into the cup until the piston has reached the lowest pos'- siblc position therein, when the tube and the piston are removed and the cup is reiilled.

ln our improved lubricator the piston is constantly pressing upon the lubricating material, and the lubricator wlll therefore supply lubricating material to the parts to be lubricated i'or a long time without requiring any attention on the part ofthe operator., thereby adapting the device more particularly for use in connection with machine parts which run with high velocity for a long time without interruption.

A iluted or longittulinally-grooved rod may be substituted for the tube b,- but we prefer to employ a tube, as it is more efiicicnt.

\Ve claim as our invention- 1. The combination, with a grease-cup, of a central discharge tube or rod extending into the cup, a piston arranged in the cup around the discharge tube or rod, and mechanism whereby the piston is moved toward the discharge-opening of the cup and the grease compaeted against the discharge tube or rod, substantially as set forth. l

2. The combination, with a grease-cup, ot' a piston and a spring whereby the piston is forced toward the discharge-openin g ot' the cup and the lubricating material automatically and gradually expelled from the cup, substantially as set forth.

3. The combination, with a grease-cup, of a discharge tube or rod extending into the cup, a piston arranged in the cup around the discharge tube or rod, and a screw whereby the piston is moved toward the discharge-oriiiee of the cup, substantially as set forth.A

4. rlhe combination, with a grease-cup, ot' a. discharge tube or rod extending into the cup, a piston arranged in the cup Yaround the discharge tube or rod, a. spring whereby the piston is automatically moved toward the discharge-opening of the cup, and an adjusting device whereby the position of the spring can be regulated, substantially as set forth. 5. The combination, with a grease-cup, A, of a discharge tube or rod, b, a piston, C, an adjustingstem, E, provided with a stop, f, a spring, g, and an adjusting device, h, substantially as set forth.

BARNIM F. ORTMAN'. LEANDER (fi. GILBERT.

Witnesses JNO. J. BONNER, GaAs. F. GEYER. 

